I have experienced a pain in the left side of my neck/shoulder for the past week. I don't know what I've done to bring it on, but it's the same pain I had in 2002 after being rear-ended, suffering whiplash. At the time my head was turned to the right, resulting in my head 'whipping' more to the side than straight back.
I'm wondering if it could be muscular, or skeletal?
Thanks, Stephen